Trending questions in Big Data Hadoop

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How to choose between Cassandra, Membase, Hadoop, MongoDB and RDBMS?

Actually it comes in two ways: One ...READ MORE

Sep 18, 2018 in Big Data Hadoop by Frankie
• 9,810 points
56 views
0 votes
1 answer

Where are Hadoop's task log files stored?

For each MapReduce job, Hadoop stores the ...READ MORE

Sep 18, 2018 in Big Data Hadoop by nitinrawat895
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48 views
+3 votes
1 answer

Apache Nifi Execute Process Processor

Hey soujanyabargavi!  NO, ExecuteProcess does not allow incoming ...READ MORE

Sep 20, 2018 in Big Data Hadoop by Omkar
• 67,660 points
725 views
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1 answer

How to achieve maximum memory to disk I/O ratio?

You need to tune io.sort.mb value until ...READ MORE

Sep 18, 2018 in Big Data Hadoop by nitinrawat895
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43 views
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1 answer

How to access Hadoop Data using REST service?

The REST API gateway for the Apache ...READ MORE

Sep 5, 2018 in Big Data Hadoop by Frankie
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608 views
0 votes
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What is Network Topology in Hadoop?

Let's imagine your cluster as a tree ...READ MORE

Sep 6, 2018 in Big Data Hadoop by Frankie
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526 views
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Understanding Hadoop Master Node, Slave Node and Data Node.

The NameNode and the JobTracker are single ...READ MORE

Sep 6, 2018 in Big Data Hadoop by Frankie
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509 views
0 votes
1 answer

What is the difference between Hadoop MapReduce and built-in MapReduce?

Differences are as follows: Hadoop's MR can be ...READ MORE

Sep 11, 2018 in Big Data Hadoop by Frankie
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216 views
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1 answer

How should I provide a URL for hdfs file system?

If you are trying to access your ...READ MORE

Sep 10, 2018 in Big Data Hadoop by Frankie
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232 views
0 votes
1 answer

Hadoop Documentation for Eclipse.

Few considerations to be taken are here: If ...READ MORE

Sep 11, 2018 in Big Data Hadoop by Frankie
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68 views
0 votes
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Will hadoop(sqoop) load oracle faster than SQL loader?

down vote Had a similar task of exporting ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Frankie
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290 views
0 votes
1 answer

Speculative Execution in Hadoop

In Hadoop, Speculative Execution is a process ...READ MORE

Aug 27, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
524 views
0 votes
1 answer

How to format the output being written by MapReduce in Hadoop?

Here is a simple code demonstrate the ...READ MORE

Sep 5, 2018 in Big Data Hadoop by Frankie
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136 views
0 votes
1 answer

What are the basic concepts for video data structure and processing?

1.  Make use of hadoop storm framework. ( ...READ MORE

Sep 7, 2018 in Big Data Hadoop by Frankie
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38 views
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1 answer

How to upgrade Apache Hadoop from 2.4.1 to 2.6.0?

If the downtime is not an issue, ...READ MORE

Sep 7, 2018 in Big Data Hadoop by Frankie
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30 views
0 votes
1 answer

Which Operating system is more preferable for data node?

In a real installation (1 active namenode, ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Neha
• 6,280 points
157 views
0 votes
1 answer

Which is the Real Time Monitoring tool/API for Hadoop?

If you're using Yarn, there's a rest ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Frankie
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150 views
0 votes
1 answer

Hbase REST API: Timerange scan

Looking at the XSD, it seems that ...READ MORE

Aug 30, 2018 in Big Data Hadoop by Neha
• 6,280 points
315 views
0 votes
1 answer

Which Windows client is used for Cloudera Hadoop Cluster?

You can very well use VM linux ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Frankie
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91 views
0 votes
1 answer

How to write examples to test whether the installation is validated or not?

You have some example jars in your ...READ MORE

Sep 5, 2018 in Big Data Hadoop by Frankie
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37 views
0 votes
1 answer

What is the Data format and database choices in Hadoop and Spark?

Use Parquet. I'm not sure about CSV ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Frankie
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75 views
0 votes
1 answer

What is the default location of Hadoop log files & how can I change that location?

The default directory of Hadoop log file ...READ MORE

May 4, 2018 in Big Data Hadoop by Shubham
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5,374 views
0 votes
1 answer

different schedulers in Hadoop

COSHH – It schedules decisions by considering ...READ MORE

Aug 27, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
398 views
0 votes
1 answer

Clarification of some Hadoop Concepts.

Please go through : http://bytepadding.com/big-data/map-reduce/understanding-map-reduce-the-missing-guide/ Lets try to understand ...READ MORE

Sep 5, 2018 in Big Data Hadoop by Frankie
• 9,810 points
27 views
0 votes
1 answer

What is the best functional language to do Hadoop Map-Reduce?

down voteacceptedBoth Clojure and Haskell are definitely ...READ MORE

Sep 4, 2018 in Big Data Hadoop by Frankie
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49 views
0 votes
1 answer

Not able to run Hive queries.

Try bin/hive -e 'LOAD DATA INPATH kv1.txt OVERWRITE ...READ MORE

Aug 30, 2018 in Big Data Hadoop by Frankie
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220 views
0 votes
1 answer

Hive with JSON: getting EOF exception while querying

You are missing the commas in your ...READ MORE

Aug 30, 2018 in Big Data Hadoop by Neha
• 6,280 points
181 views
0 votes
1 answer

Hadoop Pipe: shared libraries, No such file or directory error

Add -rpath my.zip/lib to LDFLAGS_HDP. For compilation to work, you ...READ MORE

Aug 30, 2018 in Big Data Hadoop by Frankie
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75 views
0 votes
1 answer

How do I print hadoop properties in command line?

You can dump Hadoop config by running: $ ...READ MORE

Aug 23, 2018 in Big Data Hadoop by Frankie
• 9,810 points
195 views
0 votes
1 answer

Can we integrate Hadoop with Python?

Use Hadoop streaming for using python,php etc ...READ MORE

Aug 23, 2018 in Big Data Hadoop by Frankie
• 9,810 points
148 views
0 votes
1 answer

How hadoop command works with javac?

Javac is used for compiling your java ...READ MORE

Aug 17, 2018 in Big Data Hadoop by Neha
• 6,280 points
352 views
0 votes
1 answer

Writing File into HDFS using spark scala

The reason you are not able to ...READ MORE

Apr 5, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
6,075 views
0 votes
1 answer

What is the prerequisite for BigQuery other than SQL?

If you know your SQL, you should ...READ MORE

Aug 23, 2018 in Big Data Hadoop by Frankie
• 9,810 points
35 views
0 votes
1 answer

What is the difference between Big Data and Data Mining?

Big data and data mining are two ...READ MORE

Aug 23, 2018 in Big Data Hadoop by Frankie
• 9,810 points
37 views
0 votes
1 answer

What are the problems in creating volume in mapr hadoop?

It sounds like the user you are ...READ MORE

Aug 21, 2018 in Big Data Hadoop by Frankie
• 9,810 points
58 views
0 votes
1 answer

What are the options for hadoop on scala?

Definitely check out Scalding. Speaking as a user ...READ MORE

Aug 21, 2018 in Big Data Hadoop by Frankie
• 9,810 points
42 views
0 votes
1 answer

How to Install Cloudera Manager into my Virtual Machine ?

Before you start anything, First make sure ...READ MORE

Aug 9, 2018 in Big Data Hadoop by Neha
• 6,280 points
574 views
+1 vote
3 answers

when i tried to run the hdfs namenode -format command...its failed to run..can anyone help me with this???

Hi Suriyaprakash, I guess the path for hadoop ...READ MORE

Jul 23, 2018 in Big Data Hadoop by avi_man_utd
817 views
+5 votes
2 answers

Hive to HDFS transfer

Hive does not store data. Hive is ...READ MORE

Sep 20, 2018 in Big Data Hadoop by SM
774 views
0 votes
1 answer

What is the difference between hadoop-1.2.1.bin.tar.gz and hadoop-1.2.1.tar.gz files?

As the name of the file in ...READ MORE

Aug 17, 2018 in Big Data Hadoop by Frankie
• 9,810 points
150 views
0 votes
1 answer

How Namenode handles data node failures?

Let me explain you the whole scenario. NameNode ...READ MORE

Jul 11, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
1,719 views
0 votes
1 answer

Copy file from HDFS to the local file system

There are two possible ways to copy ...READ MORE

Mar 27, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
6,274 views
0 votes
1 answer

How do I get connected to Hadoop and Geo Spatial connector?

There are a number of free and ...READ MORE

Aug 13, 2018 in Big Data Hadoop by Frankie
• 9,810 points
253 views
0 votes
1 answer

Where are Hadoop's task log files stored?

You can easily find these log files ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
119 views
0 votes
1 answer

What is the difference between local file system commands touch and touchz?

Actually they both do the same except touchz is ...READ MORE

Aug 14, 2018 in Big Data Hadoop by Frankie
• 9,810 points
211 views
0 votes
1 answer

Want to have an idea on Hadoop Machine Learning and Data Mining project.

You haven't written anything about your interest. ...READ MORE

Aug 13, 2018 in Big Data Hadoop by Frankie
• 9,810 points
199 views
0 votes
1 answer

How does Hadoop's block replacement policy work?

In your case, One copy of the ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
78 views
0 votes
1 answer

How will the Fair Scheduler handle more than one Job?

In your case when job B gets ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
49 views
0 votes
1 answer

I get an error stating- Hadoop: «ERROR : JAVA_HOME is not set». How to resolve this?

Make sure that you have removed the ...READ MORE

Aug 7, 2018 in Big Data Hadoop by Frankie
• 9,810 points
446 views
0 votes
1 answer

How to calculate number of slave nodes?

Total number of slave nodes in your ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
• 10,710 points
40 views